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2. Build up a 3/4" wide by 3/4" deep flange on backside of top portion of Former No.1 per
Figures 1-14 and 1-15. The only purpose of this is to serve as a base for the nutplates that
anchor the forward metal turtledeck, and can be built up of scraps of 3/4" plywood trimmed
to fit or can be laminated as a single bow by tracing the curve off on a work surface, drawing a
line set inside 3/4", driving nails along it, and laminating strips of 1/l6" x 3/4" wood in place.
3. Glue in Former No.1. After it has set, trim the excess side plywood and install the landing
gear support at Station 2 per Figure 1-6. When installing the inner plywood between Stations
1 and 2, carry the plywood upward along the diagonal per Figure 1-15.
4. Cut a 1/8" x 1-1/2" x 1-1/2" 2024 dural angle, trimmed flush with the top and bottom
longerons, to fit the firewall corners per Figure 1-16. Do not drill or install at this time.
NOTE
If you have difficulty getting dural angle, the weight penalty is negligible if you use 1/8"
mild steel angles easily obtainable from most metal supply stores. An alternate is to bend up
3/32" or 1/8" sheet steel, but this job will probably have to be done at a metal shop where a
22" piece can be bent on a brake.
5. Install Formers 6 through 8 on the BACK SIDES of the 3/4" top across pieces at those
stations, and glue in the six 1/4" x 1" stringers. Don't try to save weight by making the
stringers any thinner. Note from Figure 1-15 that the forward ends are notched to take a
2"strip of 1/8" plywood.
6. Fit the plywood strip to the stringers at Station 6 by laying an over-size strip, GRAIN
PARALLEL TO STRINGERS, in place and marking the forward edge by using the front of
Former 6 as a guide. Measure back 2 inches for the rear line, trim, and install. The fabric will
have a smoother appearance if the plywood is scalloped per the dotted lines of Detail A,
Figure 1-15, after installation.
7. Build up box-construction seat support beams and install with triangular glued and nailed
corner blocks per Figure 1-17.
Note positions of rudder cable holes, control stick bearings, and belly stringers for future
reference.
8. Install combined floorboard beams and wing hinge tube supports between Station 2 and 3
per Figure 1-18. The holes for the 1" I.D. tube can be drilled any time, but it is easiest to do it
now, before the beams are installed. If the tubes are installed now, be sure to leave the
matching fitting on the wing root undrilled until the wing can be installed on the fuselage and
proper alignment of the tube and the hinge assured.
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